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Chances are you hear the term bitcoin mining and your mind begins to wander to the Western fantasy of pickaxes, soil, and striking it rich. As it turns out, that analogy isnt too far away.
Far less glamorous but equally uncertain, bitcoin mining is performed by high-definition computers that solve complex computational math problems (read: so complex they cannot be solved by hand). The luck and work required by a computer to solve one of these problems is the equivalent of a miner striking gold in the ground while digging in a sandbox.
The end result of bitcoin mining is twofold. First, when computers solve these intricate math problems on the bitcoin networkthey produce new bitcoin, not unlike when a mining operation extracts gold in the ground. And second, by solving computational mathematics problems, bitcoin miners create the bitcoin payment network dependable and protected, by verifying its transaction information. .
Theres a good chance all of that only made so much sense. In order to explain how bitcoin mining functions in greater detail, lets begin with a procedure thats a little bit closer to home: the regulation of printed currency.
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Consumers tend to anticipate printed currencies, at least in the United States. Thats because the U.S. dollar is backed by a central bank called the Federal Reserve. In addition to a host of additional responsibilities, the Federal Reserve regulates the production of new money and prosecutes the use of copyright currency. .
Even electronic payments using the U.S. buck are backed with a central authority. When you make an online order using your debit or credit card, by way of instance, that transaction is processed by means of a payment processing company like Mastercard or Visa. In addition to recording your transaction history, these companies verify that transactions are not fraudulent, and that's one reason that your debit or credit card may be suspended while traveling. .
Bitcoin, on the other hand, is not regulated by a central authority. Instead, bitcoin is backed by millions of computers across the world called miners. This network of computers plays the identical function as the Federal Reserve, Visa, and Mastercard, but using a couple of important differences. Like the Federal Reserve, Visa, and Mastercard, bitcoin miners record transactions and assess their accuracy.
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When someone makes a purchase or purchase using bitcoin, we call a transaction. Transactions made in-store and online are documented by banks, point-of-sale methods, and bodily receipts. Bitcoin miners achieve the exact same effect without these institutions by clumping transactions together in blocks and adding them into a public document called the blockchain. .
When bitcoin miners add a new block of transactions to the blockchain, part of the job is to make sure that these transactions are accurate. (More on the magic of the way this official site happens in a second) In particular, bitcoin miners make sure that bitcoin are not being duplicated, a unique quirk of digital currencies known as double-spending.
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Once you spend $20 at the store, that invoice is in the clerks handson. With digital currency, however, it sites is a different story. .
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When the numbers were identical, then the clerk would know the money had been replicated. This analogy is very similar to what a bitcoin miner does when they verify new transactions. .
With as many as 600,000 purchases and sales occurring in a single day, nevertheless, verifying every one of those transactions can be a great deal of work for miners, which gets at one other crucial difference between bitcoin miners and the Federal Reserve, Mastercard, or Visa. As compensation for their efforts, miners are awarded bitcoin whenever they add a new block of transactions to the blockchain.
In 2009, it had been 50. In 2013, it had been 25, at the time of writing it is 12.5, and sometime in the center of 2020 it will halve to 6.25. .
At this speed of halving, the total number of bitcoin in circulation will approach a limit of 21 million, making the currency more scarce and valuable over time but also more expensive for miners to make.
Here is the catch. In order to get bitcoin miners to actually earn bitcoin from verifying transactions, two things must happen. To begin with, they must verify 1 megabyte (MB) worth of transactions, which can technically be as little as 1 transaction but are far more often several thousand, depending on how much data each transaction stores.